Improved variety-fbame lathe



@uh tant @anni @fitta BRAM C. WICKER AND LORSGN W. WILLIAMS, OF FAIRHAVEN, VERMONT.

Letters Patent No. 67,473, and August 6, 1867.

IMPROVED VARIETY-FRAME LATHB.

TQ ALL WHOM 1T MAYl CONCERN:

Be it known that we, ABRAM G. Wrcnnn and Lesson W. WILLIAMS, of Fairhaven, in the county of Rutland, and State of Vermont, have invented a new and improved Variety-Frame Lathe; and we do hereby declare that the following is a full, clear, and exact'description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accomnanying dr'awings,'forming part of this specification, in which- Figure 1 is a top or plan view of our improved lathe.

Figure 2 is a vertical section of the same, taken through the line :n x, iig. 1.

'Figure 3 is a detail sectional view of the same, taken through the line y y, fig. 1.

Figure 4 is a detail sectional view of the same, taken through the line z z, iig. 1.

Similar letters of reference indicate like parte.

Our invention has for its object to furnish an improved lathe, designed especially for turning ova-l and other shaped picture frames from slate or marble, but which shall be equally applicable for other uses; and it consists in the combination of the sliding-frame, shaft, patterns, adjustable bearings, and spring with each other and with the frame of the machine,ithe whole being constructed and arranged as hereinafter more fully described.

A is the bed-plate of the machine. B are the standards, which are cast solid with or securely attached to the bed-plate A. Upon the upper edges of the standards B are formed V-Shaped longitudinal grooves, in which the side bars of the frame G work hack and forth, the ends of said side boards being rigidly connected by the end cross-bars, as shown in iig.V 1. The sliding-frame C is kept in place upon the standards B by the keepers D, which, if desired, may be replaced by rollers, so as to diminish the friction. E is a shaft, which revolves in bearings rigidly attached to the sliding-frame C. F is the driving-pulley, which is secured to the central Apart of the'shaft E, as shown in iig. 1. To one end of the, shaft E is attached the chuck G, to which the slate, marble, or other substance to be turned is attached. Upon the shaft E, upon each side of the pulley F, is cut a screw-thread, upon which works the nut H. I are patterns, which are made of an oval or any other desired shape. Avportion, t', of the patterns I is cut out upon one side, as shown in iig. 3, so that the said patterns may be readilyplaced upon the shaft The piece or part is then replaced, and the nut H screwed up so as to clamp the said pattern between it and a shoulder formed upon the shaft E, as shown in fig. 1. J are uprights, the bases or feet oi' which are adjustably secured to the bedplate A by set-screws passing through slots in the said, bases and screwing into the said bed-plate, so that the position of the uprights may be adjusted according tothe size of the patterns. K is a rubber or other elastic spring, one end of which is secured to the end of the sliding-frame C, upon the opposite side of the shaft E from the uprights J.' The other end of the spring K is secured to the bed-plate A in such aposition as to hold the pattern at-all times closely against the uprights J, so that a. rectilinear reciprocating movement may be communicated to the shaft E. The spring K may, if desired, be replaced with a spring of another kind, or by a weight, the only object being to hold the frame `back, so that the patterns I may always press against the upright bearings J. L is the tool-rest, whch-is secured to the machine in such a position that it may support the tool directly opposite the chuck G.

From this construction of the machine, it will-.be seen ,that the different forms may be obtained not only by using patterns of different shape, but, byreversing 'the motion, and by holding the tool upon the oppositeside of the shaft E, entirely new figures may be obtained from the same pattern. By using a pattern considerably lurgertlxan the frame you wish to turn, re-entrant or back turns and curves may be obtained; as, for instance, a pattern with iive straight sides, made considerably larger than the frame you wish to turn, will produce a five-pointed star, with the points andl inner angles a littl'erounded. Since the patterns, I, do not at all times engage the uprighls J directly opposite the centro of the shaft'E, no pattern, unless it be round, or has regular straight sides, and the tool is held at just the right distance, and the machine is running the right Way, will duplicate itself. g

What we claim as new, andldesire to secure by Letters Patent, is-

1. The combinationof the sliding-frame C with the standards B and shaft E, substantially as herein shown and described, and for lthe purpose set forth.

2. The patterns I, constructed and secured to the shaft E. substantialljr as herein shown and described, and for the purpose set forth.

3. The combination of the upright bearings T with the 'ned-plate A and patterns I, attached to the shaft E, substantially as herein shown and described, and for the purpose set forth.

4. The combination of the spring K, or its equivalent, with the sliding-frame C and bed-plate or frame of the machine, substantially as herein shown and described. and for the purpose set forth.

ABRAM C. WICKER, LORSON W. WILLIAMS.

Witnesses:

SIMEON ALLEN, R. C. CoLBURN. 

